I have a question that I am not sure how to ask/word correctly. So forgive me if this doesn't come out correctly. Does a 240lb woman walking 3 miles at speed 3 burn more calories for the duration of the exercise than a 140lb woman walking the same distance, speed? Call me crazy but when I try to put in my walking and such the system says "walking carrying weights, walking carrying a baby" ETC....so I am curious is there a calculator that helps figure how much a person burns based on their weight??